Skiving machine



Jan. 23, 1923. 1,442,865

N V. DYER SKIVING MACHINE. F1 LED S EPT4 19. 19191 7 7 1 7 7 ffy. Q

Patented Jan. 23, 1923.

UNITED STATES PATENT OFFICE.

NEWELL V. DYER, 0F HOLBROOK, MASSACHUSETTS, ASSIGNOR T0 UNITED SHOE MACHINERY CORPORATION, OF PATERSON. NEW JERSEY, A CORPORATION 0F NEW JERSEY.

SKIVING Application filed September To LH whom t may concern.'

Be it known that I, Nnwnsa. V. Drau, a citizen of the United States, residing at l-loll brook, in the county of Norfolk and State of Massacliusetts, have invented certain ln proveniente in Skiving Machines, of which the following description in connertion with the accompanying drawings, is a speri iration, like reference characters on the drawings indicating like parts in the several figures.

This invention relates to shiving machines and is herein illustrated as embodied in a skiving machine of the Amazeen type such is shown in the patent to Alexander, No. 1,180,222.

ln that patent there is shown among other features a skiving knife, a feed roll, a presser foot `the operative face of which is normally substantially parallel to the adjacent element of the roll, and means forA supporting both ends of the foot yieldingly so that a substantially uniform pressure is applied to the Work throughout the portion engaged by the foot. This presser foot has proved very successful and has gone into wide use. Its construction, however, is soinewhat cour plicated; and, after the parts have become Worn, the foot tends to be turned by theI Work about an axis substantially parallel to the axis of the roll and thereby, by coming into Contact With the edge of the knife, to dullsaid edge.

The general object of the present invention is to provide in a skiving machine a presser foot of simple construction which possesses the advantages and is free from Athe disadvantages of the patented construction. In order to simplify the construction the outer end of the illustrative foot is supported at the end of a leaf spring thereby doing away with certain pivots and levers; and, in order to prevent the foot from being turned or oseillated so as to come into Contact with the edge of the knife, interengaging guiding means are provided on the foot and on a stationary part of the machine.

`These and other features of the invention including certain details of construction and combinations -of parts will be described as MACHINE.

19, 1919. serial No. 324,891.

cn'ibodied in an illustrative machine and pointed out in the appended claims. Refer-ruig now to the accompanying drawmurs,-

iig, l is aV front elevation of a portion ol' n skiving machine in which the present inrcntlon ,is einliodied, and

lfig. F2 is a view on an enlarged scale principally in elevation, showinginore i1` detail the instruction of the pref-:scr fom* ln lh(` drawings the inventior is shown as embodied inthe ncll-lmonn nlnazccn ski a ing machine. In this machine the work is fed against the edge of a rotary disk knife B by a rotary feed roll 5 and a rotary feed disk 7, the roll having a cylindrical surface which cri-operates with the feed disk and a frusto-conical surface which supports that portion of the Work which is being skived. The angle of the scarf produced is deter mined by the relative position of the frusto conical portion of the feed roll and thi` knife; and it is important that the work he pressed firmly and uniformly against thfle periphery of this portion of the feed ro l.

ln the construction.shown the margin of the Work acled upon by the knife pressed against the peripheryv of the feed roll di rectly in advance of the knife edge by a presser Comprising a foot 9 the outer end of which is fastened by rivets l1 to the reversely bent end of a leaf spring 18, the foot having formed integral therewith `guide flanges 14 which contact with theedges of the leaf spring. A headed pin 15 extends through a perforation in the leaf spring and is driven into the foot 9; and a coiled spring 17, which surrounds the stem of the pin, normally holds the head of the pin down against the leafspring with the presser foot in the position shown in Fig'. 1.

The inner end of the leaf `spring is fastened by a screw 19 to an edtge gage block 2l provided with a finger 23, he under surface ofthe block and finger being shaped to fit the periphery ofthe roll. n order to supplement the pressure exerted b the leaf spring, ifdesired, a knurled thum y nut 25 is l 'provided which is threaded on a pm 2t dus .essere einen i slot m the `provided"between the footy an leafl spring and is threaded into the block 21, a coiled spring 29 being interposed bctween the thumb nut and the leaf spring. By screwing the nut 25 down or up the downward pressure of the foot 9 upon the work 10() may be varied. ln order to permit adjustment of the foot, a screw 31 having a knurled head 33 is threaded through the leaf spring and bears with its lower end upon the block 21, a check nut '35 being provided to hold the screw in adjusted position.

The mounting of the block 21 is or may be substantially `the same as in the patented machine, the lower end of the arm 121, by which the block is carried, being adjustable along a guide rib 37 which in turn angularly adjustable on a plate 39, the plate being hinged to a base plate 4l so that the block 2l and all of the partsl which are assooiated with it may be swung down out of the way when access to the yknife is desired. A knurled clamping nut 43 threaded upon a pin 45, which is p-ivoted at its base to a stationary part of the machine, holds the plate 39 in the position shown. By unscrewing the nut and swinging the pin upwardly, the plate maybe freed to be swung downwardly.

When the work enters between the presser foot and the feed roll, the leaf spring will yield as a whole to permit` the foot to rise. At the same time the reversel curved portion of the leaf spring will bend7 to permit the outer end of the foot to rise, and the spring 17 will yield to permit the inner end of the foot to rise. As a result, the foot will move substantially vertically in parallel relation to the roll if the thickness of the work is uniform but will tilt somewhat if the work is beveled as will be the case where reskiving is being` done.

In order to prevent the foot from being turned aboutan axis transversey to the direction of feed of the work, which mi ht result in causing the foot to contact with the knife, interengaging guidin means are n n d the block 21,the outer yend face ofwhichserves as an edge gage` V,In thel operative face of the block 1`s cut a vertical groovefl? into which projects a pin 49, the pin being driven into the foot 9 so thathe pressure exerted by the work in thel virection" of the feed .is prevented from tilting the footabout an f irection offeed.

axis transverse to the A lthou' h thinv'entionhas been set forth ,j as einb fed in a particular construction.

rio

v and in connei:tionl with a s `Aiiiazeeii type, Vit should'l be undertha'p the `iiiveiaiffm is; not leaned in the ofjitls application tothe particula'r construction nor tothe particular type oF niahiniiwliicli has beriscribed.

nation, a knife, a feed kivingy lmachine y a straight path;

showni and del' spring, and a spring located between the inA ner end of the foot and the leaf spring.

2. A slriving machine, having in combi nation, a knife, a feed roll, a presser foot having its work engaging face normally parallel to the adjacent portion of the wozl'; engaging face of the roll, a yielding support for the outer end of the foot, 'means i for supporting the inner end to yield inde-v pendently, and interengagin guiding means formed on the foot ang on a Stationary part of the machine for guiding the foot in its yieldingmovement.

3. A skivin machine, having in combination, a kni e, a feed roll, a presser foot having its work engaging face normally parallel to the adjacent portion of the work engaging face of the roll, a yielding support for the outer e-nd of the foot, means for supporting the inner end to yield independently, and means including a pin and slot connectionbetween the foot anda ri id part of the machine for guidingthe ot in its yielding movements.

4. Askivingmachine, having in combination, a knife, a feed roll, a stationary member, a leaf spring mounted on the stationary member in such manner that its outer end is yieldable toward and from the roll, a presser foot carried by the outer-end of the leaf spring, means for yieldingly opposing movement of the inner end of the foot away from the roll, and co-operating guiding means on the presser and stationary member constructed' and arranged to prevent tilthg of the presser aboutgan 'axis parallel to the axis of rotation of their-011.

5. A skiving machine,having in combiroll, a stationary member, a leaf spring mounted onfthe stationary member' in such manner that its outer end is yieldable toward and from the roll, a presser foot carried by the outer end of the leaf spring, means for yield# ingly opposing movement ofthe inner end of the foot away fermV the roll, ,.andl oooperating glidin`v means onk the resser 'and stationary mem er, construct andarrangedto compel movement'of the` resser towardl and froml the rollte take pace in j 6. A skivin machine, having ingcombination, a' knie, aworkysupportya jyielding presser footh arranged to cti-operate with the work support rand,l interengagingiguiding means formed on the foot and on a stationary part of the machine Yfor maintaining the foot upright during its yielding movements toward and from the Work support.

"i". AV skiving machine, having` in combination, a knife, a feed roll, a yieldin r presser foot arranged to co-operate with t e feed roll, and interengaging guiding means formed on the foot and on a stationary part of the machine l'or maintaining the foot upright during its yielding movements toward and from the roll.

8. A skiving machine, having in combination, a feed roll, an edge gage block, a leaf spring fastened at its inner portion to the block and having a reversely curved outer end, and a presser foot carried by the reversely curved portion.

9. A presser foo-t construction comprising a leaf spring adapted to be fastened to a stationary part of a maehine in sueli manner that one end is free to yield, the Jfree und having a reversely curved portion, a presser foot 'fastened to the reversely curved portion, and a spring located between one end of the presser foot and the leaif spring.

In testimony whereof, I have signed my name to this speeilieation.

NEWELL V. D YER. 

